Measuring attachment for concrete-mixers.



L. W. GARGILL.

MEASURING ATTAOHMENT FOR CONCRETE MIXBRS.

APPLIOATION FILED JUNE 26, 1908. I

Patented June 29, 1909.

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MEASURING ATTACHMENT FOR CON CRE TE-MIXERS.

Specification of Letters Patent.

Patented June 29, 1909.

Application filed June 25, 1908. Serial No. 440,232.

To all whom it may concern: Be it known that I, LAWRENCE W. CAR- GILL, acitizen of the United at Columbus, in the county of Franklin and Stateof Ohio, have invented certain new and useful Improvements in MeasuringAttachments for Concrete-Mixers, of which the following is aspecification.

y invention relates to the improvement of measuring attachments forconcrete mixers and the objects of my invention are to provide inconjunction with the hopper and mixing apparatus of a machine of theclass mentioned, improved means for accurately measuring the quantitvofmixture discharged into-the mixing trough; to provide a closure of theunderside of the hopper while the material to'be mixed is beingdischarged into the mixing trou h and to produce other improvements t 1edetails of which will bemore fully Ipointed out hereinafter. Theseobjects accomplish by the means illustrated in the accompanying drawing,in which:

Figure 1 is a central vertical section of a hopper and a paratus havingmy improved measuring evice in connection therewith, Fig. 2 is-atransverse section on line xa: of Fig.1, and, Fig. 3 is a detail view inperspective of the measuring and discharging box.

Similar numerals refer to similar parts throughout the several views.

1 represents the vertically disposed flaring hopper of a concrete mixerwhich is supported upon a horizontal base or platform 2, the latterhaving extending downward from one side thereof the inclined innerwallof a mixing trough 3 in which is contained a suitable rotary mixingdevice, which latter may be in the nature of a conveyer or screw 4. 1 Inportion of the hopper I form an opening an beneath this opening isadapted to be supported a box or receptacle 5, the latter mg formed onits rear side with a horizontal extension 5, the up er side of whichisclosed and the lower sldh of which bears upon the floor or platform 2.The undersi e of the receptacle 5 is provided with a bottom plate 6which is hinged at its rear end to the framework of the receptacle asindicated at 6*.

On the trough side of the hopper opening through which the box 5 isadapted to move,

' I provide the outlet of said opening which is indicated at 1,withparallel horizontal 'ide projections 1",'one 0 these projectionseing States, residing f I indicated in Fig. 1 of the drawing. With theend or side-"of the receptacle 5 which is adjacent to the trough I pivotas indicated at 7 one end of a bar or link 7, the outer end of which isin turn pivotally connected with an arm 8 which is carried on ahorizontal rock shaft 9, the latter extending in the direction of thelength of the mixing screw 4 and being mounted in suitable bearlngs 10supported from near the upper portion of the trough 3.

The shaft 9 also carries an arm 11 with the outer end of which ispivotally connected at downwardly extending bar 12, the lower end ofwhich I have shown pivotally and eccentrically connected with a disk 13which is carried on the shaft 4 of the rotary mixer 4.

14 represents a brush bar or head which is secured horizontally to theinner face of the forward side of the hopper 1 and from this bar or head4 depend vertical brush wires'14" the lower end portions of which areflush with the upper side of the receptacle 5.

In utilizing my invention, it will be understood that rotary motion issuitably iniparted to the mixer, its shaft 4 and disk 13 and that whenthe box 5 is receiving its charge of crushed stone, sand and cement orother materials, said box is located within the lower opening of thehopper into which the material to be mixed is suitably fed. Owing to therotation of the disk 13 and the consequent reciprocating movement ofthe' bar 12, it is obvious that an intermittent rotation of the shaft 9will be produced and through the connection of said shaft with the bar7, the box 5 will have imparted thereto an outward and inward slidingmovement. When said box is thus moved outward to the position indicatedin dotted lines in Fig. 1, it is obvious that its hinged bottom plate 6will drop downward into the trough, thus permitting the contents of thebox to drop to the mixer. In the movement of the box to the positionshown in Fig. 1 of the drawing, it is obvious that the hinged bottomplate 6 will be forced to a closed position. When the box is in itsouter or 0 en position, it is obvious that the top of the 0x extension 5Will have moved to the position where it will intersect the hopper andprevent the discharge therefrom of material which may be containedtherein. The connections between the box 5 and the rotary mixer are 'soarranged as to insure an outward dis-.

charging action of the box at each revolution of the mixer, therebyproviding for the complete discharge of a predetermined quantity ofmaterial into the mixing trough at regular intervals. During the outwardmovement of the box, it is obvious that the brush wires 14: will serveto prevent, the material from being forced outward over the'top of thebox.

Although I have shown and described specific means for producing anoutward and inward movement of the discharging and measuring box fromthe rotary movement of the mixer, it is. obvious that other desirableconnections might be employed.

From the construction and operation described, it will readily beunderstood that means are provided not nly for producing a beneath saidhopper, said boxhaving a rearward extension 5 a which lies beneath thebottom of the hopper when said box is at its foremost limit of movement,a 'rotative mixing member disposed in the bottom of said trough,connections between said rotative mixing member and-said box forimparting a reciprooatory movement to said box, a toothed brush securedto the front wall of the hopper, the teeth of which extend down to thetop of said box, and a flat late hingedly secured to therear wall of theox, said plate a lying between the bottom of the box and the extensionof the. trough when said box is at its rearmost limit of movement, saidplate riding down over the inclined wall of the mixing trough when saidbox is at its foremost limit of movement.

In testimony whereof I affix my signature in presence of two Witnesses.

LAWRENGE W. CARGILL.

Witnesses: w

L. CARL S'roUsH'roN, I A. L. PHELPS.

